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Our Mission

At our office, we ensure that patients receive the most advanced orthodontic care. Our office regularly attends seminars and conferences devoted to orthodontic treatment, new technology and patient care. With patient care as our top priority, this is our commitment to you.

Dr.Seth Kleinrock

Dr. Kleinrock has been practicing orthodontics in the Five Towns for more than 28 years. After graduating Summa Cum Laude from the University of Maryland Dental School and winning the University Gold Medal for graduating first in his class, he completed a General Practice Residency at New York Hospital Medical Center – Queens Division. His orthodontic specialty took place at the University of Medicine and Dentistry of New Jersey.

Dr. Kleinrock has articles published in various orthodontic journals as well has lectured at local dental societies, and has been named for ten consecutive years to the Century Club as one of Align Technology’s top 100 doctors of Invisalign treatment. He is currently one of Invisalign’s Diamond Providers, representing the top 1% of Invisalign doctors nationally, and lectures throughout the United States to other orthodontists on the use of Invisalign. Dr. Kleinrock also received the 2011 New York Top Doctors and Dentists award.

Outside The Office

Dr. Kleinrock resides in Hewlett with his wife Adele. Embracing the empty nest lifestyle, Adele is pursuing her passion as a potter and pottery instructor. Their son, Ross, is a consultant, and aspires to start his own business. Sydney, their daughter is a budding artist. Dr K., still feeling like a kid, loves playing softball, golf, tennis, skiing, and rooting for his Mets and Jets. They all enjoy traveling together as a family.
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Dr.Irene Zeppieri

Dr. Zeppiere has enjoyed practicing orthodontics since 2002. She earned her DMD in May of 2000 on an Academic Dean’s Scholarship from the prestigious University of Pennsylvania School of Dental Medicine. After graduating at the top of her class, she continued at the University of Pennsylvania where she completed her orthodontic specialty training in 2002. She is a member of the American Association of Orthodontics and the North East Society of Orthodontics.
Her research articles have been published in the American Journal of Orthodontics and she continues to expand her knowledge of the specialty of orthodontics by attending numerous continuing education courses and seminars. Dr. Zeppieri joined the practice upon completion of her orthodontic residency in 2002.

Outside The Office

When Dr. Zeppieri is not treating patients, she enjoys spending time with her husband Daniel and their two daughters, Daniela and Giulia, traveling to places new and old, or getting lost in a good book. She loves dabbling in photography, gourmet cooking and taking culinary classes, and trying her hand at baking and cake decorating with her daughters.


We are especially interested in making all our patients feel right at home! We put your needs first to achieve efficient and comprehensive treatment. Our staff is trained and skilled, and we strive to provide energetic and fun-loving service to each patient. Each member of our team has years of experience in treating patients with the highest level of care. We strive to stay abreast of the very latest in technology and advances by regularly attending continuing education courses and seminars.

The Office